bring in ARP support for variable length link level addresses

Reviewed by:	jdp
Approved by:	jdp
Obtained from:	NetBSD
MFC after:	6 weeks

1 files changed, 149 insertions, 0 deletions

diff --git a/sys/net/if_arc.h b/sys/net/if_arc.h
new file mode 100644
index 0000000..630c41f
--- /dev/null
+++ b/sys/net/if_arc.h
@@ -0,0 +1,149 @@
+/*	$NetBSD: if_arc.h,v 1.13 1999/11/19 20:41:19 thorpej Exp $	*/
+/* $FreeBSD$ */
+
+/*
+ * Copyright (c) 1982, 1986, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * from: NetBSD: if_ether.h,v 1.10 1994/06/29 06:37:55 cgd Exp
+ *       @(#)if_ether.h	8.1 (Berkeley) 6/10/93
+ */
+
+#ifndef _NET_IF_ARC_H_
+#define _NET_IF_ARC_H_
+
+/*
+ * Arcnet address - 1 octets
+ * don't know who uses this.
+ */
+struct arc_addr {
+	u_int8_t  arc_addr_octet[1];
+} __attribute__((__packed__));
+
+/*
+ * Structure of a 2.5MB/s Arcnet header.
+ * as given to interface code.
+ */
+struct	arc_header {
+	u_int8_t  arc_shost;
+	u_int8_t  arc_dhost;
+	u_int8_t  arc_type;
+	/*
+	 * only present for newstyle encoding with LL fragmentation.
+	 * Don't use sizeof(anything), use ARC_HDR{,NEW}LEN instead.
+	 */
+	u_int8_t  arc_flag;
+	u_int16_t arc_seqid;
+
+	/*
+	 * only present in exception packets (arc_flag == 0xff)
+	 */
+	u_int8_t  arc_type2;	/* same as arc_type */
+	u_int8_t  arc_flag2;	/* real flag value */
+	u_int16_t arc_seqid2;	/* real seqid value */
+} __attribute__((__packed__));
+
+#define	ARC_ADDR_LEN		1
+
+#define	ARC_HDRLEN		3
+#define	ARC_HDRNEWLEN		6
+#define	ARC_HDRNEWLEN_EXC	10
+
+/* these lengths are data link layer length - 2*ARC_ADDR_LEN */
+#define	ARC_MIN_LEN		1
+#define	ARC_MIN_FORBID_LEN	254
+#define	ARC_MAX_FORBID_LEN	256
+#define	ARC_MAX_LEN		508
+
+
+/* RFC 1051 */
+#define	ARCTYPE_IP_OLD		240	/* IP protocol */
+#define	ARCTYPE_ARP_OLD		241	/* address resolution protocol */
+
+/* RFC 1201 */
+#define	ARCTYPE_IP		212	/* IP protocol */
+#define	ARCTYPE_ARP		213	/* address resolution protocol */
+#define	ARCTYPE_REVARP		214	/* reverse addr resolution protocol */
+
+#define	ARCTYPE_ATALK		221	/* Appletalk */
+#define	ARCTYPE_BANIAN		247	/* Banyan Vines */
+#define	ARCTYPE_IPX		250	/* Novell IPX */
+
+#define ARCTYPE_INET6		0xc4	/* IPng */
+#define ARCTYPE_DIAGNOSE	0x80	/* as per ANSI/ATA 878.1 */
+
+#define	ARCMTU			507
+#define	ARCMIN			0
+
+#define ARC_PHDS_MAXMTU		60480
+
+struct	arccom {
+	struct	  ifnet ac_if;		/* network-visible interface */
+
+	u_int16_t ac_seqid;		/* seq. id used by PHDS encap. */
+
+	u_int8_t  arc_shost;
+	u_int8_t  arc_dhost;
+	u_int8_t  arc_type;
+
+	u_int8_t  dummy0;
+	u_int16_t dummy1;
+	int sflag, fsflag, rsflag;
+	struct mbuf *curr_frag;
+
+	struct ac_frag {
+		u_int8_t  af_maxflag;	/* from first packet */
+		u_int8_t  af_lastseen;	/* last split flag seen */
+		u_int16_t af_seqid;
+		struct mbuf *af_packet;
+	} ac_fragtab[256];		/* indexed by sender ll address */
+};
+
+#ifdef _KERNEL
+extern u_int8_t arcbroadcastaddr;
+extern int arc_ipmtu;	/* XXX new ip only, no RFC 1051! */
+
+void	arc_ifattach __P((struct ifnet *, u_int8_t));
+void	arc_ifdetach __P((struct ifnet *));
+void	arc_storelladdr __P((struct ifnet *, u_int8_t));
+char	*arc_sprintf __P((u_int8_t *));
+int	arc_isphds __P((int));
+void	arc_input __P((struct ifnet *, struct mbuf *));
+int	arc_output __P((struct ifnet *, struct mbuf *,
+	    struct sockaddr *, struct rtentry *));
+int	arc_ioctl __P((struct ifnet *, int, caddr_t));
+
+void		arc_frag_init __P((struct ifnet *));
+struct mbuf *	arc_frag_next __P((struct ifnet *));
+
+#endif
+
+#endif /* _NET_IF_ARC_H_ */